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Cosmological perturbations in modified teleparallel gravity models

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arxiv 1808.05565 v2 pith:UG7Y532K submitted 2018-08-16 gr-qc astro-ph.COhep-th

Alexey Golovnev , Tomi Koivisto This is my paper · ORCID
classification gr-qcastro-ph.COhep-th
keywords modelsteleparallelcosmologicalgravityperturbationsaccuratelyanalysedbackgrounds
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abstract

Cosmological perturbations are considered in $f(T)$ and in scalar-torsion $f(\varphi)T$ teleparallel models of gravity. Full sets of linear perturbation equations are accurately derived and analysed at the relevant limits. Interesting features of generalisations to other teleparallel models, spatially curved backgrounds, and rotated tetrads are pointed out.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Cosmological Perturbation in New General Relativity: Propagating mode from the violation of local Lorentz invariance

    gr-qc 2025-09 conditional novelty 7.0 of 10

    In New General Relativity on a flat expanding universe, the propagating spectrum is computed for all nine types, with Type 3 carrying five stable tensor, scalar, and vector modes.

  2. $f(T)$ Gravity: Background Dependence and Propagating Degrees of Freedom

    gr-qc 2025-02 conditional novelty 6.0 of 10

    By perturbing f(T) gravity around FLRW and Bianchi I spacetimes, the authors find that only the two gravitational-wave polarizations propagate in the gravity sector.

  3. Higgs-like inflation in scalar-torsion $f(T,\phi)$ gravity in light of ACT-SPT-DESI constraints

    gr-qc 2025-12 conditional novelty 5.0 of 10

    Higgs-like inflation in f(T,φ) torsion gravity can accommodate the ACT/DESI upward shift in the scalar spectral index while predicting a tensor-to-scalar ratio r≈0.01–0.04.

  4. Teleparallel dark energy in a nonflat universe

    gr-qc 2025-05 conditional novelty 5.0 of 10

    Nonflat teleparallel dark energy with a vanishing potential is statistically favored over Lambda CDM in the authors' MCMC fit and mildly prefers an open universe.

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